Process of decorating glass



0. F; OGREN PROCESS OF DECORATING GLASS March 10. 1925.

Filed Oct. 1, 1924 PATENT OFFICE.

0. FREIIEERICK OGREN, OF CHICAGO, ILLINOIS.

PROCESS OI? DECORATING GLASS.

Application fil ed October 1, 1924. Serial No? 741,068.

To all whom it may concern:

- Be it known that I, O. FREDERICK OoRnN, a subject of the King of Sweden, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful I mprovements in Processes of Decorating Glass, of which the following is a specification.

This invention relates to a process of decorating plate glass, mirrors, panels or any sheet glass used for ornamental purposes and the invention also relates to the product of such process.

Briefly stated, an important object is to provide simple means by which a plurality of colors may be economically and effectivelyemployed to reproduce floral and other designs on a piece of glass.

A further aimof the invention is to provide means wherebythe necessity of deeply grooving the rear side of the glass in the engraving, cutting, etching or similar operation preparatory to the application of the color matter is overcome.

Also, an important aim is to greatly simplify and cheapen the engraving or other cutting operation on the glass by leaving the walls of the grooves unpolished and completing the process of decorating the glass without causing the unpolished walls of the grooves to minimize the effectiveness of the decoration.

A further object is to provide means to decorate glass in such a manner that an extremely durable and attractive product is produced.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawing forming a part of this application and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a front elevation of a glass constructed in accordance with this invention;

Figure 2 is a rear elevation illustrating the bronze powder mixed with a bronzing liquid applied to the rear side of the glass to fill some or all of the grooves or depressions therein;

Figure 3 is a detail sectional view through the glass.

In the drawing wherein for the purpose of illustration is shown a preferred embodiment of the invention, the numeral 5 designates a piece of glass of any shape or style and having its rear side out by engraving, etching or otherwise to form one or more depressions 6.

After grooving the rear surface of the glass in any well known manner it is cleaned and thoroughly dried. When this has been done a coating of bronze powder mixed with a bronzing liquid is applied with a brush over the entire design if only one color is employed.

If a combination of colors is desired the different colors are applied to each different part of the design. When dry, a sharp knife is employed to scrape off the coloring matter which may have run over on the fiat rear surface. of the glass.

It will be seen that the walls of the grooves of the design are now coated with one or more colors and preparatory to silvering or applying a contrasting color of bronze powder mixture or any other kind of paint or pigment color, the rear surface of the glass 1s again cleaned.

Considering the invention as thus'far described it will be seen that the rear side of the glass is grooved in any suitable manner after which the several grooves are provided with coloring matter and the surplus coloring matter is scraped off. A silveringor contrasting coloring is now applied to the entire rear surface of the glass and allowed to remain.

Finally a protective or backing paint such as that employed in the manufacture of mirrors is applied to the entire rear surface of the'glass.

When viewed from the front, the design produced in accordance with this invention will stand out brilliantly against a light reflecting background of silver or any other color desired.

One of the principal advantages of the invention resides in the fact that the bronze powder mixture will adhere to the engraved or sunken part and show the engraving in every detail with the same eflect which is produced by silvering. Other paints or pigments will not bring the same eifect. They will make a color, but at the same time deaden the effect of the engraving. In scraping off the colors from the surface of the glass the bronze powders will come off smooth and evenly on account of their grainy consistency. Y

Also, a further advantage over silvering the design resides in the fact that the bronze powders will give a lustrous finish without the necessity of polishing the design before the application of the coloring matter. The

application of silver to the unfinished walls 0 the rooves of the engraving produces a. grey ull finish.

t has also been found that a design produced in accordance with this invention does not require that the grooves in the lass be deep as when silvermg is applied. ghallow. grooves are suificient.

A plurality of colors maybe employed for producing the desired effect. For instance, a floral design consisting of roses, daisies, leaves and stems by this process appears in natural colors, white with yellow centers, the roses red and the leaves and stems green.

A variety of color effects can be produced by this process and be made to match any decorative scheme where delicate color effects are required. It may be used for ornamental mirrors and panels, inlays on furniture, lamp stands, clocks, radio and phonograph cabinets, I pianos, picture frames, or wherever a plate or sheet glass panel is desired.

Having thus described the invention, what is claimed is 1. The herein described process of decorating glass which consists in forming one side of the glass with grooves and allowing the walls of the grooves to remain unfinished, and subsequently applying a bronze coloring paint directly to the unfinished walls of the grooves.

with the daisies coating of bronzing pigment directly to said unfurnished walls and then applying a reflecting means to the side of the glass with the depressions.

3. The process as outlined in claim 2, the reflecting means being provided with a protective coating. 3

4. As an article of manufacture, a piece of glass having one side vide a decorative desi n, he walls of the groove being unfinishe a coating of bronze powder mixed with a bronzing liquid applied directly to and in intimate contact with the unfinished walls of the grooves, a reflecting coating applied to the grooved side of the piece of glass, and a protective coating applied to the. reflecting coating.

5. As an article of manufacture, a piece of glass having one side grooved to provide,

a decorative design, the walls of the grooves being unfinished, a coating of bronze poW- der mixedwith a bronzing liquid applied directly to and in intimate contact with the unfinished walls of the grooves, a reflecting coating of said piece of glass, a protective coating applied to the reflecting coating, the grooves in the glass being sha low.

In testimony whereof I aflix my signature.

o. FREDERICK OGREN.

rooved to pro applied to the grooved side 3 

